Jesus said that he himself testifies but the Father is the second witness. For there to be two witnesses, their corroboration or otherwise must be meaningful, which means they must be independent. That is to fulfil the law. So they cannot be both one being. They must be two, independent beings. Not just two persons. Two beings. A shared essence like Trinitarians preach would undermine their independence. Jesus saw no such undermining. He knew that the Father’s testimony is independent to his own. He knew they are two. Two because the law needs two testimonies, independent testimonies. But in 2 John we also see that John warns that those who do not have the Father and the Son do not have God. That word means Divinity. He uses the word we translate as God, the word for divinity, to cover both the Father and the Son. So they are two but together they are Divinity. Hence that Divinity is not anything which undermines their being two testimonies required to be independent by the law. They are still independent. Yet both are described rightly by John in his second epistle as (singular) Divinity. That singularity is not a contradiction of them being two independent beings, able both to corroborate each other or not corroborate. This Divinity is not only ascribed to the Father but also to the Son because the Son fully does the Father’s will, teaches the Father’s teachings, represents the Father, and is Son of the Father. He is the one the Father sets apart and sends into the world, who will judge all, and will have all things subjected to him by the Father, until the day he hands it all over to the Father and is subject to the Father forever. Then the Father will be God, the one true God forever, but with Jesus the Son at His side forever too.
